A stereoselective approach to indolizidine and pyrrolizidine alkaloids: total synthesis of (−)-lentiginosine, (−)-epi-lentiginosine and (−)-dihydroxypyrrolizidine
作者:Shruti Vandana Kauloorkar、Vishwajeet Jha、Ganesh Jogdand、Pradeep Kumar
DOI:10.1039/c4ob00461b
日期:——
A simple and highly efficient approach to hydroxylated pyrrolizidine and indolizidine is developed from an aldehyde as a starting material using organocatalytic and asymmetric dihydroxylation reactions as key steps. Its application to the total synthesis of (−)-lentiginosine, (−)-epi-1,2-lentiginosine and (−)-dihydroxypyrrolizidine is also reported.
使用有机催化和不对称二羟基化反应作为关键步骤,从醛类为起始原料开发了一种简单高效的羟基化吡咯烷核苷和吲哚唑烷的方法。还报道了其在(-)-龙胆草碱,(-)- epi -1,2-龙胆草碱和(-)-二羟基吡咯烷核苷的全合成中的应用。